W949 Pill — WHITE OVAL, 19mm — Clarithromycin
| Imprint | W949 |
|---|---|
| Colour | WHITE |
| Shape | OVAL |
| Size | 19 |
| Strength | CLARITHROMYCIN 500 mg |
| Dosage form | Tablet, Film Coated |
| Manufacturer | Blenheim Pharmacal, Inc. |
| NDC | 10544-522 |
| Schedule | — |
| Availability | — |
| Ingredients | CLARITHROMYCIN[CLARITHROMYCIN] |
What does this imprint mean?
The imprint "W949" is a code stamped or printed on the tablet or capsule by the manufacturer, used to identify the drug, its strength and the maker.
Active ingredient
Clarithromycin
Uses and warnings
No boxed warning. Contraindicated with "hypersensitivity to clarithromycin or any macrolide," and co-administration with cisapride, pimozide, ergot alkaloids, lurasidone, and (in patients with renal/hepatic impairment) colchicine, lovastatin, or simvastatin due to serious interaction risk. Key warnings include "severe acute hypersensitivity reactions" requiring immediate discontinuation, "QT prolongation" with risk of torsades de pointes, hepatotoxicity that can be severe and sometimes fatal, embryo-fetal toxicity, and Clostridioides difficile-associated diarrhea.
Indicated for mild to moderate infections including "acute bacterial exacerbation of chronic bronchitis," "acute maxillary sinusitis," "community-acquired pneumonia," "pharyngitis/tonsillitis," "uncomplicated skin and skin structure infections," "acute otitis media" in pediatric patients, treatment and prophylaxis of disseminated Mycobacterium avium complex infections, and, in combination regimens, "Helicobacter pylori infection and duodenal ulcer disease."
How to identify this pill
- • Check the imprint matches exactly: "W949".
- • Confirm the colour (WHITE) and shape (OVAL).
- • Compare the size (19) against a ruler if possible.
- • When in doubt, confirm with a pharmacist before taking any medication.
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Official references
Source: FDA Structured Product Label via NLM Pillbox archive (retired 2021); source file f6a47a9e-897d-4982-9ee5-fd39f07e3922.xml